Issue |
A&A
Volume 404, Number 2, June III 2003
|
|
---|---|---|
Page(s) | L33 - L36 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20030708 | |
Published online | 02 June 2003 |
Letter to the Editor
Nuclear composition and heating in accreting neutron-star crusts
N. Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warszawa, Poland e-mail: jlz@camk.edu.pl
Corresponding author: P. Haensel, haensel@camk.edu.pl
Received:
11
March
2003
Accepted:
12
May
2003
Nuclear reactions in accreting
neutron-star crusts and the heat release accompanying them
are studied, under different assumptions concerning the
composition of the outermost layer formed of the ashes of X-ray bursts. Particular
examples of ashes containing nuclides with are considered and
compared with a standard
case. In all cases, evolution of a crust shell is
followed from
to a few times
. The
total crustal heating produced in the non-equilibrium processes in the accreting crust
is
per one accreted nucleon. The composition of the accreted crust at
densities exceeding the threshold for the pycnonuclear fusion
(
) is essentially independent of the assumed
initial composition of the X-ray burst ashes.
Key words: dense matter / equation of state / stars: neutron / stars :general / X-rays: bursts / X-ray: binaries / nuclear reactions
© ESO, 2003
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